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Documentation: rs485: Do not define manually the ioctl

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It is not a very good practice to define the IOCTL manually instead of
using the header file.

Fix it on the documentation example.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Ricardo Ribalda Delgado 2016-08-18 10:54:19 +02:00 committed by Jonathan Corbet
parent 7a9011db32
commit 5021bb933a
1 changed files with 2 additions and 3 deletions
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5
Documentation/serial/serial-rs485.txt
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@ -45,9 +45,8 @@
#include <linux/serial.h>
/* RS485 ioctls: */
#define TIOCGRS485 0x542E
#define TIOCSRS485 0x542F
/* Include definition for RS485 ioctls: TIOCGRS485 and TIOCSRS485 */
#include <sys/ioctl.h>
/* Open your specific device (e.g., /dev/mydevice): */
int fd = open ("/dev/mydevice", O_RDWR);